function getWindowWidth()
{
	if (window.innerHeight) {
		// NS & Mozila
		return window.innerWidth;
	} else {
		// IE & Opera
		return document.body.scrollWidth;
	}
}
function conv(num)
{
	var s = String(num);
	num = s.replace(/,/g, "");

	if (isNaN(parseFloat(num)))
			return 0;
	else	return parseFloat(num);
}

function clearContent(field, initContent)
{
	if (field.value==initContent)
	{
		field.value="";
	}
}
function restoreContent(field, initContent)
{
	if (field.value=="")
	{
		field.value = initContent;
	}
}